La Crosse Technology UV100 - Manual (Page 4)

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5.7 UV Index Mode - Setting the Upper and Lower UV Index Alarms
5.8 UV Index Mode - Precautions to UV Index Calibration
5.9 UV Index Mode - To Determine the Calibration Factor (CAL)
scroll the
setting by
increment of 1
L o w U V I n d e x A la r m
'LO' Lower
UV Index
Alarm
'CAL'
Calibration
'HI' Upper
UV Index
Alarm
hold
[mode]
hold
[mode]
[mode]
[mode]
[mode]
scroll
the setting
faster
scroll
the setting
faster
[start/stop]
[lap/reset]
hold [start/stop]
hold
[lap/reset]
UV Index Mode
Setting Sequence
! To set the Upper, Lower UV Index Alarm and
calibrate the UV Index, press and hold the [mode]
button for about 2 seconds to select the setting
display.
! When the 'LO' indicator appear: Press the
[start/stop] or [lap/reset] button to select the
Lower UV Index Alarm setting among 0 to 25
(select ' -- ' to turn OFF the alarm) by scrolling of
1 (hold down the button to scroll the setting faster).
! When the 'HI' indicator appear: Press the
[start/stop] or [lap/reset] button to select the
Upper UV Index Alarm setting among 0 to 25
(select ' -- ' to turn OFF the alarm) by scrolling of
1 (hold down the button to scroll the setting faster).
Note: To control the UV exposure by a two-level
alarm, set a smaller value (for example: 6) for the
Lower UV Index Alarm, and set a larger value (for
example: 10) for the Upper Index Alarm.
! When the above settings finished, either press
and hold the [mode] button for about 2 seconds
to exit the setting sequence or press the [mode]
button once to calibrate the UV Index.
! To calibrate the UV Index, check the coming '5.8
Precautions to UV Index Calibration', '5.9 To
Determine the Calibration Factor (CAL)' and '5.10
Calibrating the UV Index' Sections for more detail
on the UV Index Calibration.
!
should not need to calibrate the Watch again.
!
!
Th e Watch's UV sensor has been calibrated
in the factory. The most possible cause
for deviation is the Ozone thickness,
difference between the place of use and cali-
bration of the Watch. For normal usage, you
! DO NOT attempt to calibrate the UV index unless
you have the following items to determine the
Calibration Factor (CAL):
1) Standard UV generator or
2) Correct immediate local UV Index
DO NOT use the UV Index broadcasted by the
local weather station as the correct UV index, it
may NOT the correct one at your place when you
calibrating your Watch,
this is because:
1) Weather stations usually broadcast the 15-
minute mean UV Index to public. It is different
from the instantaneous UV radiation that your
Watch is now sensing.
2) Cloud condition affects UV Index. Hence, the
UV Index at your location may not be
identical to the one at weather station if the two
cloud conditions are not alike.
Check the coming '5.9 To Determine the
Calibration Factor (CAL)' Sections for more detail
on how to determine CAL.
! Determine the CAL by using the following rules:
1)Correct UV Index: The UV index produced
by a standard UV generator or other similar
means.
2)Exhibited UV Index: The UV Index exhibited by
the Watch when it is exposed to the previous
standard UV generator.
3)ADJ: The percentage change of UV Index.
Hence ADJ = ((Correct UV Index - Exhibited
UV index) / Exhibited UV index) X 100%
4)Calibration Factor (CAL): The value that to be
selected for the calibration. CAL= 25 + ADJ.
Example 1: To adjust the UV Index from 4.8
(Exhibited UV index) to 4.0 (Correct UV Index).
! ADJ = ((4.0 - 4.8) / 4.8) X 100 = -17;
! CAL= 25 + ADJ;
! Hence, CAL=25 -17 = 8.
Example 2: To adjust the UV Index from 7.8
(Exhibited UV index) to 8.0 (Correct UV Index).
! ADJ = ((8.0 - 7.8) / 7.8) X 100 = 3;
! CAL= 25 + ADJ;
! Hence, CAL=25 +3 = 28.
To resume the Watch to its original setting
for sensing UV radiation, select the default
value (25) as the CAL during the calibration. !
UV Index Mode
(Current UV Index Display)
scroll the
setting by
decrement of 1
The Cloud Effect on UV Index
The Time Frame Effect on UV Index
! To prevent user getting UV over-exposure, this
Watch includes two UV Index Alarms. They are
the Upper UV Index Alarm and Lower UV Index
Alarm.
! These UV Index Alarms can be set separately by
the user. Check the coming '5.7 Setting the Upper
and Lower UV Index Alarms' Section for more
detail on how to set the UV Index Alarms.
! When one UV Index Alarm has been set, the
corresponding bar segment will be flashing on
UV Index Alarm Sound
! In all of the modes: Whenever the Current UV
Index is equal to or larger than the Upper or
Lower UV Index Alarm, the Watch starts beeping
for about 10 seconds.
UV Index Alarm Indicator
! In all of the UV Index displaying modes: When the
Current UV Index equal to or larger than the
Lower UV Index Alarm, the 'Rays' of the UV Index
Alarm Indicator starts flashing on the display.
! In all of the UV Index displaying mode: When the
Current UV Index equal to or larger than the
Upper UV Index Alarm, the whole UV Index Alarm
Indicator starts flashing on the display.
the
display.
5.6 UV Index Mode - UV Index Alarm
the whole UV Index
Alarm Indicator flash
the UV Index Alarm
Indicator appear steadily
Current
UV Index
UV Index Mode
(Current UV Index Display)
The UV Index Alarm -
Alarm Sound and UV Alarm Indicator
0
UV Index
Time
'beep'
for 10
seconds
'beep'
for 10
seconds
UV Index
Alarm Icon
the 'Ray' of the UV Index
Alarm Indicator flash
the Upper
UV Index
'HI' Alarm
the Lower
UV Index
'LO' Alarm
Current UV Index
bar segments
Lower UV Index Alarm
represents by the
flashing bar segment
Upper UV
Index Alarm
represents by
the flashing
bar segment
Location A
(with an Higher
UV Index)
Location B
(with a Lower
UV Index)
the Sun
UV Index Broadcasted
by Weather Station
UV Index Exhibited
by the Watch
15-minute mean
UV Index
May
NOT
equal to
Instantaneous
UV Index
Ultraviolet
Radiation
How Exhibited UV Index
is obtained for determent of CAL
Exhibited
UV Index
Standard UV Generator
(Correct UV Index)
the Watch
UV Sensor
Ultraviolet
Radiation